A new large-scale, computer-controlled, compression-torsional multi-axial loading apparatus has been designed, developed, and tested. This apparatus integrates many geotechnical testing functions, such as cyclic triaxial and cyclic torsional shear. This apparatus has three main characteristics. First, it features specimens of two different sizes, which can be chosen according to the experimental requirements. The height of the larger specimen reaches 600 mm. Second, the loading degrees of freedom, including axial force, torque, inner pressure, outer pressure, pore pressure, and related displacements, can be controlled separately, which is useful in the study of soil behavior under complicated stress paths. Finally, the stress or strain path can be preprogramed into the computer before conducting tests and can also be controlled automatically during the tests. Test results show that the control accuracy of the apparatus can meet the requirements of geotechnical material tests.